CIRCUIT: Primary Rod/Ball Mill Circuit
Sampling Date: 18-Oct-83
Time: 19:00
TEST ID 102
Unit name: Rod Mill
Internal dia, m 3.51
Internal len, m 4.11
Critical speed, % 61
Media load, % 35
Media type rods
Media size, mm 89
Power demand, kw 560
Unit name Primary Cyclones
# of parallel cyclones 3
Cyclone dia, m 0.38
Inlet dia, m 0.10
Vortex finder dia, m 6 0.152
Apex dia, m 3 0.076
Cyclinder len, m 0.28
Cone angle, degrees 15
Pressure drop, kpa 70
Unit name: #2 Ball Mill
# of parallel mills 1
Internal dia, m 3.51
Internal len, m 4.11
Critical speed, % 61
Media load, % 35
Media type slug
Media size, mm 76.2
Power demand, kw 616
MATERIAL BALANCE                
  RMD   PCUF #2 BMD PCOF
  Meas Estimate Meas Estimate Meas Estimate Meas Estimate
Solids, sdtph   176.7   284.1   284.1   176.7
Solids, mdtph   160.3   257.7   257.7   160.3
Water, sdtph   55.5   82.7   82.7   145.1
Water, mdtph   50.3   75.0   75.0   131.7
% Solids     76.1   77.4 77.5   77.5 77.5 54.9  
SIZE DISTRIBUTIONS, CUMULATIVE % PASSING                      
MESH MICRONS RMF RMD   PCUF     #2 BMD   PCOF  
    Meas Meas Smoothed Meas Smoothed   Meas Smoothed Meas Smoothed
1.5" 38100 99.4                  
1" 25400 96.7                  
.75" 19050 94.0                  
.625" 15875 88.6                  
.5" 12700 83.3                  
.375" 9525 70.7                  
.25" 6700 62.8                  
4 Mesh 4750 56.8 99.9 99.9 99.9 99.9   100.0 100.0 100.0 100.0
6 Mesh 3350 51.5 99.2 99.2 99.5 99.5   100.0 100.0 100.0 100.0
8 Mesh 2360 46.3 97.7 97.8 98.5 98.5   99.8 99.8 100.0 100.0
10 Mesh 1700 41.9 94.5 94.6 96.1 96.0   99.3 99.3 100.0 100.0
14 Mesh 1180 37.7 88.2 88.5 91.4 91.0   97.7 97.8 99.5 99.5
20 Mesh 850 34.2 80.4 80.9 85.0 84.4   94.7 95.0 98.0 97.9
28 Mesh 600 30.4 70.5 70.9 75.6 75.0   88.7 89.1 93.7 93.6
35 Mesh 425 27.3 61.8 62.0 64.9 64.5   80.0 80.4 87.9 87.7
48 Mesh 300 23.7 52.2 52.4 49.9 49.6   65.3 65.8 78.7 78.4
65 Mesh 212 20.5 43.9 44.0 36.7 36.6   51.2 51.5 68.2 67.9
100 Mesh 150 17.2 35.6 35.7 25.4 25.4   37.8 37.9 56.1 55.9
150 Mesh 106 14.3 28.5 28.5 17.8 17.8   28.2 28.2 45.1 45.2
200 Mesh 75 11.7 22.2 22.1 12.8 12.8   21.1 21.1 35.4 35.4
270 Mesh 53 9.7 17.8 17.8 9.8 9.8   16.6 16.6 28.5 28.7
SIZE DISTRIBUTIONS, WEIGHT PERCENT ON SIZE                       % Heavies (Sink at 2.97)
MESH MICRONS RMF RMD   PCUF     #2 BMD   PCOF   PCUF PCOF
    Meas Meas Smoothed Meas Smoothed   Meas Smoothed Meas Smoothed Meas Meas
1.5" 38100 0.6                      
1" 25400 2.7                      
.75" 19050 2.7                      
.625" 15875 5.4                      
.5" 12700 5.3                      
.375" 9525 12.6                      
.25" 6700 7.8                      
4 Mesh 4750 6.1 0.1 0.1 0.1 0.1           1% 1%
6 Mesh 3350 5.3 0.7 0.7 0.4 0.4           1% 1%
8 Mesh 2360 5.3 1.5 1.4 1.0 1.1   0.2 0.2 0.0 0.0 28% 1%
10 Mesh 1700 4.4 3.3 3.2 2.4 2.5   0.5 0.5 0.0 0.0 30% 1%
14 Mesh 1180 4.2 6.3 6.1 4.7 5.0   1.6 1.5 0.5 0.5 33% 1%
20 Mesh 850 3.5 7.8 7.7 6.4 6.6   2.9 2.8 1.5 1.6 38% 4%
28 Mesh 600 3.8 9.9 10.0 9.4 9.4   6.0 5.9 4.3 4.4 48% 8%
35 Mesh 425 3.1 8.7 8.8 10.7 10.5   8.8 8.7 5.8 5.9 59% 14%
48 Mesh 300 3.6 9.6 9.7 15.0 14.8   14.6 14.6 9.2 9.3 65% 21%
65 Mesh 212 3.2 8.3 8.4 13.2 13.0   14.1 14.3 10.5 10.5 67% 32%
100 Mesh 150 3.3 8.3 8.3 11.3 11.3   13.5 13.6 12.1 12.0 67% 39%
150 Mesh 106 3.0 7.1 7.2 7.6 7.5   9.5 9.7 11.0 10.7 64% 41%
200 Mesh 75 2.6 6.3 6.3 5.0 5.1   7.2 7.2 9.7 9.7 61% 43%
270 Mesh 53 2.0 4.4 4.4 3.0 3.0   4.5 4.5 6.9 6.8 58% 47%
Pan   9.7 17.8 17.8 9.8 9.8   16.6 16.6 28.5 28.7    
Comments: Cyclones steady at 10 psi